$OpenBSD: patch-environ_c,v 1.2 2011/11/04 10:00:19 jasper Exp $
--- environ.c.orig	Mon Sep 29 12:00:24 1997
+++ environ.c	Fri Nov  4 10:57:45 2011
@@ -40,11 +40,14 @@
 
 #define SUBS_DEFINED
 
+#include <stdlib.h>
 #include <string.h>
 #include <dos.h>
 #include <io.h>
 #include <fcntl.h>
 #include <alloc.h>
+#include <sys/types.h>
+#include <utime.h>
 
 FILE *
 file_open(name, mode)
@@ -432,14 +435,17 @@ uint  host;
 
 #include <time.h>
 
+#if !(defined(__OpenBSD__))
 #ifndef time_t
 #define time_t long
 #endif
+#endif
 
+#if !(defined(BSD) && BSD >= 199306)
 extern struct tm *localtime();
-extern time_t time();
 extern char   *strcpy();
 extern voidp  *malloc();
+#endif
 
 FILE *
 file_open(name, mode)
@@ -535,8 +541,12 @@ uint mode;
 }
 
 long
-gettz()         /* returns the offset from GMT in seconds */
+gettz(stamp)	/* returns the offset from GMT in seconds */
+time_t stamp;
 {
+#if defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__)
+	return -localtime(&stamp)->tm_gmtoff;
+#else
 #define NOONOFFSET    43200L
 #define SEC_IN_DAY    (24L * 60L * 60L)
 #define INV_VALUE     (SEC_IN_DAY + 1L)
@@ -552,6 +562,7 @@ gettz()         /* returns the offset from GMT in seco
     noontm = localtime(&noon);
     retval = NOONOFFSET - 60 * (60 * noontm->tm_hour - noontm->tm_min);
     return retval;
+#endif
 }
 
 long
@@ -609,7 +620,8 @@ uint  host;
     (uint) attribute;
     (uint) host;
 
-    m_time = mstonix(tstamp) + gettz();
+    m_time = mstonix(tstamp);
+    m_time += gettz(m_time);
 
     tb.mtime = m_time;                  /* Set modification time */
     tb.atime = m_time;                  /* Set access time */
